EP2138056A2 - Non-woven material for use as moisture-permeable, microporous luxury food packaging - Google Patents

Non-woven material for use as moisture-permeable, microporous luxury food packaging Download PDF

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Publication number
EP2138056A2
EP2138056A2 EP09163337A EP09163337A EP2138056A2 EP 2138056 A2 EP2138056 A2 EP 2138056A2 EP 09163337 A EP09163337 A EP 09163337A EP 09163337 A EP09163337 A EP 09163337A EP 2138056 A2 EP2138056 A2 EP 2138056A2
Authority
EP
European Patent Office
Prior art keywords
nonwoven fabric
fabric according
binder
fibers
nonwoven
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09163337A
Other languages
German (de)
French (fr)
Other versions
EP2138056A3 (en
EP2138056B1 (en
Inventor
Hagen Hohmuth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tenowo GmbH
Original Assignee
eswegee Vliesstoff GmbH
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Application filed by eswegee Vliesstoff GmbH filed Critical eswegee Vliesstoff GmbH
Publication of EP2138056A2 publication Critical patent/EP2138056A2/en
Publication of EP2138056A3 publication Critical patent/EP2138056A3/en
Application granted granted Critical
Publication of EP2138056B1 publication Critical patent/EP2138056B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D04H1/4258—Regenerated cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/49—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D04H1/5418—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/544—Olefin series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/68—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions the bonding agent being applied in the form of foam

Definitions

  • the invention relates to a nonwoven fabric for use as a moisture-permeable, microporous semi-luxury packaging material, according to the preamble of patent claim 1.
  • the production, composition and packaging of an oral tobacco are revealed. It is stated that the weighed tobacco can be bag-shaped, for example, in a cellulose acetate package.
  • nonwovens used to package the portion nus are often bonded nonwovens made of 100% viscose fibers (as longitudinally oriented batt). These are made with a thermoplastic Binders, which is applied as an aqueous, foamed polymer dispersion bound.
  • Such nonwovens may contain a binder solids content of 20-70%, and sometimes exhibit highly abrasive behavior that can cause problems in processing the material. It is largely determined by the amount of binder used.
  • nonwovens for the packaging of oral tobacco must have a good heat sealability.
  • a very good sealable fleece is often so sticky that it collects dirt particles during manufacture and thus becomes unsalable.
  • a bonding or sticking of the nonwoven fabric to the role occur, so that it can not be separated.
  • An exemplary machine for making individual Snuspierechen is in the WO 2008/062301 A1 shown.
  • the tobacco mixture is portioned via a rotary plate and transported to the packaging apparatus.
  • the snus portions are blown by means of a nozzle in an endless web of packaging material.
  • the packaging material is unwound from a roll and positioned around a mandrel.
  • the edges of the fabric are sealed longitudinally by means of ultrasonic welding elements. Below the mandrel, another ultrasonic welding element is placed to divide the endless wrapping web into small snus packets after filling with individual tobacco portions.
  • the object of the invention is achieved by a nonwoven fabric for use as a moisture-permeable, microporous semi-luxury packaging material according to feature combination according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.
  • the nonwoven fabric is for use as a moisture-permeable, microporous semi-perfume packaging material of a viscose fiber base web, e.g. is mechanically, chemically or preconsolidated by water jet and has a reduced proportion of binders and / or fusible fibers of a thermoplastic polymer material.
  • the nonwoven to be produced Due to preconsolidation e.g. by means of water jet, the nonwoven to be produced has on the one hand the required porosity, for use as packaging material for oral tobacco and on the other hand it is more resistant to abrasion and cheaper material costs than previously used packaging materials.
  • the required heat-sealing capability of the nonwoven fabric can be obtained on the one hand from the admixture of polymer fibers in the base nonwoven.
  • the polymer fibers are part of the pre-consolidated by water jet base material.
  • the polymer fibers are polypropylene fibers.
  • a fiber amount of polypropylene fibers and viscose fibers is present, which is processed by the method of hydroentanglement to form a nonwoven.
  • the nonwoven fabric produced has a basis weight of substantially 25 g / m 2 and consists of a fiber material which consists of 70% viscose fibers and 30% polypropylene fibers.
  • the required heat sealability can be obtained by using a binder which is not or only partially crosslinked and is obtained from a polymer dispersion applied to the base web.
  • a preferred method for applying the binder is the foam impregnation of the base web with the polymer dispersion.
  • the foamed polymer dispersion can be applied from one or both sides by means of a special doctor blade system.
  • a one-sided application of the foam can be made so that the foam does not completely penetrate the fleece.
  • the impregnation or coating of the base nonwoven material increases the basis weight by up to 5 g / m 2 .
  • the binder mass In the previously known nonwovens which consist of up to 30 - 40% of polymer and have a basis weight of 24 - 30 g / m 2 , must therefore be expected with a binder mass of at least 10 g / m 2 .
  • polymeric binder As a suitable polymeric binder can be used on the one hand purely thermoplastic binder based on polyacrylates. On the other hand, the use of crosslinkable systems based on a vinyl acetate copolymer is possible.
  • a particular advantage of the described nonwoven fabric is that it can be dyed.
  • This may preferably be black or black brown, but also other colors.
  • the colors black or brown are of particular advantage, since the used oral tobacco in this color segment can rub off on the nonwoven fabric. With such a dyed fleece these discolorations are no longer visible.
  • conspicuously colorfully colored oral tobacco packaging, such as red or green, can be used for marketing reasons in order to stand out clearly from competitive products.
  • the nonwoven fabric according to the invention can be used in the production of snus packaging with the already known packaging machines.
  • 25 g / m 2 basis weight of viscose fibers are processed by the method of hydroentanglement to nonwoven. This is coated on one side with a polymer dispersion by means of a foam injector so that a solids deposit of 5 g / m 2 results.
  • the foam application is followed by a drying process in a belt dryer.
  • 25 g / m 2 fiber material which consists of 70% viscose fibers and 30% polypropylene fibers, processed by hydroentanglement to a nonwoven and then dried. There is no need for another application of binders.
  • the heat-sealability of the material is obtained from the polypropylene fibers, which provide, for example, when processing with an ultrasonic welder for sealing the snus bag.
  • the coloring of the nonwoven fabric can be carried out via the binder dispersion.
  • food-compatible dyes are used here.
  • the dyed binder can be used for dyeing.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The fabric has pre-solidified base fibrous web formed of viscous fibers and exhibiting a reduced portion of bonding agents and/or fusible fibers made of thermoplastic polymer material. The fabric contains polypropylene fibers. The agents are partially cross-linked or not entirely cross-linked, and are obtained from polymer dispersion. The agents are present on a side of the web. The agents are introduced into the web by foam impregnation. The agents act as thermoplastic binders on basis of acrylic resins or as crosslinkable binders on basis of vinyl acetate copolymers.

Description

Die Erfindung betrifft einen Vliesstoff zur Verwendung als feuchtedurchlässiges, mikroporöses Genussmittelverpackungsmaterial, gemäß Oberbegriff des Patentanspruchs 1.The invention relates to a nonwoven fabric for use as a moisture-permeable, microporous semi-luxury packaging material, according to the preamble of patent claim 1.

Neben der allgemein bekannten Art des Genusses von Tabak in Form von Zigaretten, Pfeifen, Schnupftabak oder Kautabak, existiert eine weitere Form des oralen Tabakgenusses, nämlich Snus. Diese vor allem in Skandinavien verbreitete Form des Oraltabaks, ist ein mit Salzen versetzter Tabak, der unter die Oberlippe gesteckt wird.In addition to the well-known way of enjoying tobacco in the form of cigarettes, pipes, snuff or chewing tobacco, there is another form of oral tobacco pleasure, namely snus. This form of oral tobacco, which is common in Scandinavia, is a salted tobacco that is put under the upper lip.

Es wird zwischen losem Snus und portionsverpacktem Snus unterschieden, wobei der Lössnus, als feuchtes Pulver in Dosen verpackt, vor dem Gebrauch mit den Fingern oder anderen Hilfsmitteln portioniert werden muss. Der Portionsnus hingegen ist bereits in kleinen Beuteln (ähnlich kleinen Teebeuteln) abgepackt und zum direkten Gebrauch geeignet, d. h. der mit dem Tabak befüllte Beutel wird vollständig unter die Oberlippe gesteckt.A distinction is made between loose snus and portion-packed snus, where loess, packaged as a moist powder, must be portioned with fingers or other aids before use. The Portionsnus, however, is already packaged in small bags (similar to small teabags) and suitable for direct use, d. H. The bag filled with tobacco is placed completely under the upper lip.

In der WO 2008/056135 A2 werden die Produktion, Zusammensetzung und die Verpackung eines Oraltabaks offenbart. Es wird aufgeführt, dass der abgewogene Tabak beispielsweise in einer Celluloseacetat-Verpackung beutelförmig versiegelt werden kann.In the WO 2008/056135 A2 the production, composition and packaging of an oral tobacco are revealed. It is stated that the weighed tobacco can be bag-shaped, for example, in a cellulose acetate package.

Bei zur Abpackung des Portionsnus verwendeten Vliesstoffen handelt es sich außerdem oftmals um gebundene Vliesstoffe aus 100 % Viskosefasern (als längsorientierter Faserflor). Diese werden mit einem thermoplastischen Bindemittel, welches als wässrige, verschäumte Polymerdispersion appliziert wird, gebunden.In addition, the nonwovens used to package the portion nus are often bonded nonwovens made of 100% viscose fibers (as longitudinally oriented batt). These are made with a thermoplastic Binders, which is applied as an aqueous, foamed polymer dispersion bound.

Derartige Vliesstoffe können einen Bindemittelfeststoffanteil von 20 - 70 % enthalten und zeigen mitunter stark abrasives Verhalten, das bei der Verarbeitung des Materials zu Problemen führen kann. Es wird maßgeblich durch die Menge des verwendeten Bindemittels bestimmt.Such nonwovens may contain a binder solids content of 20-70%, and sometimes exhibit highly abrasive behavior that can cause problems in processing the material. It is largely determined by the amount of binder used.

Bisher bekannte Vliesstoffe zur Verwendung als Snusverpackungsmaterial können mit dem derzeitigen Stand der Technik nur in weiß hergestellt werden. In diesem Zusammenhang verstärkt dies das Sichtbarwerden leichter Abfärbungen des Oraltabaks auf das Vliesmaterial.Previously known nonwovens for use as snus packaging material can only be made in white with the current state of the art. In this context, this increases the visibility of slight discoloration of the oral tobacco on the nonwoven material.

Vliesstoffe zur Verpackung von Oraltabak müssen vor allem über eine gute Heißsiegelfähigkeit verfügen. Ein sehr gut siegelfähiges Vlies ist häufig so klebrig, dass es bei der Herstellung Schmutzpartikel sammelt und somit unverkäuflich wird. Außerdem kann ein Zusammen- bzw. Ankleben des Vliesstoffes an der Rolle auftreten, sodass es nicht mehr getrennt werden kann.Above all, nonwovens for the packaging of oral tobacco must have a good heat sealability. A very good sealable fleece is often so sticky that it collects dirt particles during manufacture and thus becomes unsalable. In addition, a bonding or sticking of the nonwoven fabric to the role occur, so that it can not be separated.

Eine beispielhafte Maschine zur Herstellung einzelner Snuspäckchen wird in der WO 2008/062301 A1 dargestellt. Zunächst wird das Tabakgemisch über einen Rotationsteller portioniert und zum Verpackungsapparat transportiert. Dort werden die Snusportionen mittels einer Düse in eine Endlosbahn von Verpackungsmaterial gepustet. Das Verpackungsmaterial wird dabei von einer Rolle abgewickelt und um einen Dorn positioniert. Die Kanten des Gewebes werden in Längsrichtung mittel Ultraschallschweißelementen versiegelt. Unterhalb des Dorns ist ein weiteres Ultraschallschweißelement platziert, um die Endlosverpackungsbahn nach dem Befüllen mit einzelnen Tabakportionen, in kleine Snuspäckchen zu unterteilen.An exemplary machine for making individual Snuspäckchen is in the WO 2008/062301 A1 shown. First, the tobacco mixture is portioned via a rotary plate and transported to the packaging apparatus. There, the snus portions are blown by means of a nozzle in an endless web of packaging material. The packaging material is unwound from a roll and positioned around a mandrel. The edges of the fabric are sealed longitudinally by means of ultrasonic welding elements. Below the mandrel, another ultrasonic welding element is placed to divide the endless wrapping web into small snus packets after filling with individual tobacco portions.

Um das soeben dargelegte Heißversiegelverfahren weiterhin bei der Abpackung von Snusportionen anwenden zu können und gleichzeitig auf Vliesstoffe mit hohen Bindemittelanteilen und den damit einhergehenden Verfahrensproblemen auf Grund des abrasiven Verhaltens und der starken Klebrigkeit der bekannten Vliesstoffe verzichten zu können, ist es die Aufgabe der vorliegenden Erfindung einen weiterentwickelten Vliesstoff anzugeben, der über eine gute Heißsiegelfähigkeit verfügt ohne mit den soeben genannten nachteiligen Materialeigenschaften behaftet zu sein. Zudem soll es mit dem anzugebenden Vliesstoff ermöglicht werden, Verpackungsmaterial bereitzustellen, das farbig ausgeführt ist oder eingefärbt werden kann.In order to be able to continue to apply the above-described heat sealing method in the packaging of snus portions and at the same time be able to dispense with nonwovens with high binder contents and the associated process problems due to the abrasive behavior and the strong stickiness of the known nonwoven fabrics, it is the task to provide the present invention, a further developed nonwoven fabric, which has a good heat sealability without being associated with the aforementioned adverse material properties. In addition, it should be possible with the specified nonwoven fabric to provide packaging material that is colored or can be colored.

Die Lösung der Aufgabe der Erfindung erfolgt durch einen Vliesstoff zur Verwendung als feuchtedurchlässiges, mikroporöses Genussmittelverpackungsmaterial gemäß Merkmalskombination nach Patentanspruch 1, wobei die Unteransprüche mindestens zweckmäßige Ausgestaltungen und Weiterbildungen darstellen.The object of the invention is achieved by a nonwoven fabric for use as a moisture-permeable, microporous semi-luxury packaging material according to feature combination according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.

Erfindungsgemäß besteht der Vliesstoff zur Verwendung als feuchtedurchlässiges, mikroporöses Genussmittelverpackungsmaterial aus einem Grundvlies aus Viskosefasern, das z.B. mechanisch, chemisch oder mittels Wasserstrahl vorverfestigt ist und einen reduzierten Anteil an Bindemitteln und/oder schmelzbaren Fasern aus einem thermoplastischen Polymermaterial aufweist.According to the invention, the nonwoven fabric is for use as a moisture-permeable, microporous semi-perfume packaging material of a viscose fiber base web, e.g. is mechanically, chemically or preconsolidated by water jet and has a reduced proportion of binders and / or fusible fibers of a thermoplastic polymer material.

Aufgrund der Vorverfestigung z.B. mittels Wasserstrahl, verfügt das herzustellende Vlies zum einen über die benötigte Porosität, zur Verwendung als Verpackungsmaterial für Oraltabak und zum anderen ist es abriebfester und günstigern in den Materialkosten als bisher verwendete Verpackungsmaterialien.Due to preconsolidation e.g. by means of water jet, the nonwoven to be produced has on the one hand the required porosity, for use as packaging material for oral tobacco and on the other hand it is more resistant to abrasion and cheaper material costs than previously used packaging materials.

Die benötigte Heißsiegelfähigkeit des Vliesstoffes kann einerseits aus der Beimischung von Polymerfasern in das Grundvlies gewonnen werden. In diesem Fall sind die Polymerfasern Bestandteil des mittels Wasserstrahl vorverfestigten Grundmaterials.The required heat-sealing capability of the nonwoven fabric can be obtained on the one hand from the admixture of polymer fibers in the base nonwoven. In this case, the polymer fibers are part of the pre-consolidated by water jet base material.

Zweckmäßigerweise handelt es sich bei den Polymerfasern um Polypropylenfasern.Conveniently, the polymer fibers are polypropylene fibers.

In einer besonders bevorzugten Ausführungsform liegt ein Fasergemenge aus Polypropylenfasern und Viskosefasern vor, welches mittels der Methode der Wasserstrahlverfestigung zu einem Vlies verarbeitet wird.In a particularly preferred embodiment, a fiber amount of polypropylene fibers and viscose fibers is present, which is processed by the method of hydroentanglement to form a nonwoven.

Der hergestellte Vliesstoff weist ein Flächengewicht von im Wesentlichen 25 g/m2 auf und besteht aus einem Fasermaterial, welches aus 70 % Viskosefasern und 30 % Polypropylenfasern besteht.The nonwoven fabric produced has a basis weight of substantially 25 g / m 2 and consists of a fiber material which consists of 70% viscose fibers and 30% polypropylene fibers.

Andererseits kann die benötigte Heißsiegelfähigkeit durch Einsatz eines Bindemittels gewonnen werden, das nicht oder lediglich teilvernetzt ist und aus einer auf des Grundvlies aufgebrachter Polymerdispersion gewonnen wird.On the other hand, the required heat sealability can be obtained by using a binder which is not or only partially crosslinked and is obtained from a polymer dispersion applied to the base web.

Aufgrund der gezielten Vorverfestigung des Vliesstoffs z.B. mittels Wasserstrahlen wird nur noch ein reduzierter Anteil eines derartigen Bindemittels benötigt, wobei das Bindemittel mindestens auf einer Seite des Grundvlieses aufgetragen wird.Due to the targeted preconsolidation of the nonwoven fabric, e.g. By means of water jets only a reduced proportion of such a binder is required, wherein the binder is applied at least on one side of the base web.

Eine bevorzugte Methode zur Aufbringung des Bindemittels stellt die Schaumimprägnierung des Grundvlieses mit der Polymerdispersion dar. Dabei kann die verschäumte Polymerdispersion von einer oder von beiden Seiten mittels eines speziellen Rakelsystems aufgetragen werden.A preferred method for applying the binder is the foam impregnation of the base web with the polymer dispersion. The foamed polymer dispersion can be applied from one or both sides by means of a special doctor blade system.

Ein einseitiger Auftrag des Schaums kann so erfolgen, dass der Schaum das Vlies nicht vollständig durchdringt.A one-sided application of the foam can be made so that the foam does not completely penetrate the fleece.

Vorzugsweise erhöht die Imprägnierung oder Beschichtung des Grundvliesmaterials das Flächengewicht um bis zu 5 g/m2. Dies ist eine erhebliche Verminderung des Bindemittelanteils, da der Binder nicht mehr primär dazu dient die Fasern zusammenzuhalten, sondern nur bzgl. der gewünschten Heißsiegelfähigkeit als Klebstoff fungiert. Bei den bislang bekannten Vliesstoffen die bis zu 30 - 40 % aus Polymer bestehen und eine Flächenmasse von 24 - 30 g/m2 aufweisen, muss folglich mit einer Bindemittelmasse von mindestens 10 g/m2 gerechnet werden.Preferably, the impregnation or coating of the base nonwoven material increases the basis weight by up to 5 g / m 2 . This is a significant reduction in binder content because the binder is no longer primarily used to hold the fibers together, but only functions as an adhesive with respect to the desired heat sealability. In the previously known nonwovens which consist of up to 30 - 40% of polymer and have a basis weight of 24 - 30 g / m 2 , must therefore be expected with a binder mass of at least 10 g / m 2 .

Als geeigneter polymerer Binder kann zum einen rein thermoplastischer Binder auf Basis von Polyacrylaten verwendet werden. Zum anderen ist der Einsatz von vernetzbaren Systemen auf Basis eine Vinylacetat-Copolymers möglich.As a suitable polymeric binder can be used on the one hand purely thermoplastic binder based on polyacrylates. On the other hand, the use of crosslinkable systems based on a vinyl acetate copolymer is possible.

Ein besonderer Vorteil des beschriebenen Vliesstoffs, liegt darin, dass dieser eingefärbt werden kann. Bevorzugt kann dies in den Farben schwarz oder braun, aber auch anderen Farben erfolgen. Die Farben schwarz oder braun sind von besonderem Vorteil, da der verwendete Oraltabak in diesem Farbsegment auf den Vliesstoff abfärben kann. Bei einem derartig gefärbten Vlies sind diese Abfärbungen nicht mehr sichtbar. Zudem können auffällig bunt eingefärbte Oraltabakverpackungen, wie rot oder grün, aus vermarktungstechnischen Gründen verwendet werden, um sich von Wettbewerbsprodukten eindeutig abheben zu können.A particular advantage of the described nonwoven fabric is that it can be dyed. This may preferably be black or black brown, but also other colors. The colors black or brown are of particular advantage, since the used oral tobacco in this color segment can rub off on the nonwoven fabric. With such a dyed fleece these discolorations are no longer visible. In addition, conspicuously colorfully colored oral tobacco packaging, such as red or green, can be used for marketing reasons in order to stand out clearly from competitive products.

Der erfindungsgemäße Vliesstoff kann bei der Produktion von Snusverpackungen mit den bereits bekannten Verpackungsautomaten verwendet werden.The nonwoven fabric according to the invention can be used in the production of snus packaging with the already known packaging machines.

Die Erfindung soll nachstehend anhand zweier Ausführungsbeispielen näher erläutert werden.The invention will be explained in more detail below with reference to two embodiments.

In einem ersten Ausführungsbeispiel sind 25 g/m2 Flächengewicht Viskosefasern nach dem Verfahren der Wasserstrahlverfestigung zu Vlies verarbeitet. Dieses wird mittels eines Schauminjektors einseitig mit einer Polymerdispersion beschichtet, sodass sich eine Feststoffauflage von 5 g/m2 ergibt. An den Schaumauftrag schließt sich ein Trocknungsprozess in einem Bandtrockner an. In diesem Fall ist es auch möglich, das wasserstrahlvorverfestigte Vlies beidseitig mit der Polymerdispersion zu beschichten, sodass sich trotzdem nur eine Gesamtfeststoffauflage von 5 g/m2 ergibt.In a first embodiment, 25 g / m 2 basis weight of viscose fibers are processed by the method of hydroentanglement to nonwoven. This is coated on one side with a polymer dispersion by means of a foam injector so that a solids deposit of 5 g / m 2 results. The foam application is followed by a drying process in a belt dryer. In this case, it is also possible to coat the water-jet prebonded nonwoven on both sides with the polymer dispersion, so that nevertheless only a total solids deposit of 5 g / m 2 results.

In einem weiteren Ausführungsbeispiel wird 25 g/m2 Fasermaterial, welches aus 70 % Viskosefasern und 30 % Polypropylenfasern besteht, durch Wasserstrahlverfestigung zu einem Vlies verarbeitet und anschließend getrocknet. Es muss kein weiterer Auftrag von Bindemitteln erfolgen. Die Heißsiegelfähigkeit des Materials wird aus den Polypropylenfasern gewonnen, die beispielsweise bei der Bearbeitung mit einem Ultraschallschweißgerät für eine Versiegelung des Snusbeutels sorgen.In a further embodiment, 25 g / m 2 fiber material, which consists of 70% viscose fibers and 30% polypropylene fibers, processed by hydroentanglement to a nonwoven and then dried. There is no need for another application of binders. The heat-sealability of the material is obtained from the polypropylene fibers, which provide, for example, when processing with an ultrasonic welder for sealing the snus bag.

Die Einfärbung des Vliesstoffs kann über die Bindemitteldispersion vorgenommen werden. Hierbei kommen selbstverständlich lebensmittelverträgliche Farbstoffe zur Anwendung. Um die gewünschte Farbigkeit zu erhalten, besteht die Möglichkeit, bereits gefärbte Fasern einzusetzen und ein farbloses Bindemittel zu nutzen. Bei dem Einsatz einer farbneutralen oder weißen Faser kann zur Färbung das eingefärbte Bindemittel benutzt werden. Es ist jedoch auch eine Kombination des Einsatzes einer farbigen Faser mit einem Bindemittel, das Farbstoffe enthält, denkbar.The coloring of the nonwoven fabric can be carried out via the binder dispersion. Of course, food-compatible dyes are used here. In order to obtain the desired color, it is possible to use already dyed fibers and a colorless Use binders. When using a colorless or white fiber, the dyed binder can be used for dyeing. However, it is also conceivable to combine the use of a colored fiber with a binder containing dyes.

Claims (15)

Vliesstoff zur Verwendung als feuchtedurchlässiges, mikroporöses Genussmittelverpackungsmaterial,
dadurch gekennzeichnet, dass
ein vorverfestigtes Grundvlies aus Viskosefasern einen reduzierten Anteil an Bindemitteln und/oder schmelzbaren Fasern aus einem thermoplastischen Polymermaterial aufweist.Nonwoven fabric for use as a moisture-permeable, microporous semi-luxury packaging material,
characterized in that
a preconsolidated base web of viscose fibers has a reduced level of binders and / or fusible fibers of a thermoplastic polymer material. Vliesstoff nach Anspruch 1,
dadurch gekennzeichnet, dass
das Grundvlies Polymerfasern aufweist, welche Bestandteile eines vorzugsweise mittels Wasserstrahl vorzuverfestigenden Materials sind.Nonwoven fabric according to claim 1,
characterized in that
the base fleece comprises polymer fibers which are constituents of a material which is preferably pre-consolidated by means of water jet. Vliesstoff nach Anspruch 2,
dadurch gekennzeichnet, dass
dieser Polypropylenfasern enthält.Nonwoven fabric according to claim 2,
characterized in that
contains these polypropylene fibers. Vliesstoff nach Anspruch 3,
dadurch gekennzeichnet, dass
ein Fasergemenge aus Polypropylenfasern und Viskosefasern vorliegt.Nonwoven fabric according to claim 3,
characterized in that
a fiber amount of polypropylene fibers and viscose fibers is present. Vliesstoff nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, dass
dieser ein Flächengewicht von im Wesentlichen 24 bis 30 g/m2 aufweist und aus einem Fasermaterial besteht, welches 60% bis 70% Viskosefasern und 30% bis 40% Polypropylenfasern aufweist.Nonwoven fabric according to one of the preceding claims,
characterized in that
this has a basis weight of substantially 24 to 30 g / m 2 and consists of a fiber material which comprises 60% to 70% viscose fibers and 30% to 40% polypropylene fibers. Vliesstoff nach Anspruch 1,
dadurch gekennzeichnet, dass
das eingesetzte Bindemittel nicht oder lediglich teilvernetzt ist und aus einer aufgebrachten Polymerdispersion gewonnen wird.Nonwoven fabric according to claim 1,
characterized in that
the binder used is not or only partially crosslinked and is obtained from an applied polymer dispersion. Vliesstoff nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, dass
das Bindemittel auf mindestens einer Seite des Grundvlieses befindlich ist.Nonwoven fabric according to one of the preceding claims,
characterized in that
the binder is located on at least one side of the base web. Vliesstoff nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, dass
das Bindemittel mittels Schaumimprägnierung in das Grundvlies eingebracht ist.Nonwoven fabric according to one of the preceding claims,
characterized in that
the binder is introduced into the base fleece by means of foam impregnation. Vliesstoff nach Anspruch 8,
dadurch gekennzeichnet, dass
das verschäumte Bindemittel mittels eines Rakelsystems aufgetragen wird.Nonwoven fabric according to claim 8,
characterized in that
the foamed binder is applied by means of a doctor blade system. Vliesstoff nach Anspruch 8 oder 9,
dadurch gekennzeichnet, dass
im Ergebnis der Imprägnierung oder Beschichtung das Flächengewicht des Grundvliesmaterials sich um bis zu 5 g/m2 erhöht.Nonwoven fabric according to claim 8 or 9,
characterized in that
as a result of the impregnation or coating, the basis weight of the base nonwoven material increases by up to 5 g / m 2 . Vliesstoff nach einem der Ansprüche 6 bis 10,
dadurch gekennzeichnet, dass
es sich bei dem Bindemittel um ein thermoplastisches Bindemittel auf Basis von Polyacrylaten handelt.Nonwoven fabric according to one of claims 6 to 10,
characterized in that
it is the binder is a thermoplastic binder based on polyacrylates. Vliesstoff nach einem der Ansprüche 6 bis 10,
dadurch gekennzeichnet, dass
es sich bei dem Bindemittel um ein vernetzbares Bindemittel auf Basis eines Vinylacet-Copolymers handelt.Nonwoven fabric according to one of claims 6 to 10,
characterized in that
it is the binder is a crosslinkable binder based on a vinyl acetate copolymer. Vliesstoff nach einem der vorangegangen Ansprüche,
dadurch gekennzeichnet, dass
der Vliesstoff eingefärbt wird.Nonwoven fabric according to one of the preceding claims,
characterized in that
the nonwoven fabric is dyed. Vliesstoff nach einem der Ansprüche 1 bis 12,
dadurch gekennzeichnet, dass
die eingesetzten Viskosefasern als Ausgangsstoff farbig sind.Nonwoven fabric according to one of claims 1 to 12,
characterized in that
the viscose fibers used as starting material are colored. Vliesstoff nach einem der Ansprüche 1 bis 12,
dadurch gekennzeichnet, dass
dem Bindemittel ein lebensmittelechter Farbstoff zugeführt ist.Nonwoven fabric according to one of claims 1 to 12,
characterized in that
the binder is fed a food-grade dye.
EP09163337.0A 2008-06-26 2009-06-22 Non-woven material for use as moisture-permeable, microporous luxury food packaging Not-in-force EP2138056B1 (en)

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